Investigation Two Part 3 Vocabulary Changes in Properties of Matter

Physical Change It is a physical change if . . . A change in the appearance, size, shape, or state of matter in which nothing new is formed. It is a physical change if . . . Can be reversible, or irreversible Substance may seem different, but the way the atoms link up is the same. It dissolves. It changes shape or size Or the substance changes phase.

Condense Freeze Melt Evaporate Solid Liquid Gas

melting The process of a solid changing to a liquid as a result of adding heat energy.

The change of state from a gas to a liquid condensation The change of state from a gas to a liquid

Freezing-the process of a liquid changing to a solid as a result of cooling

Conductivity- the ability of a material to carry energy Examples: metal = high conductivity wood = poor conductivity

Thermal conductivity The ability of a material to conduct heat.

Electrical conductivity The ability of a material to conduct electricity

Buoyance The ability of an object to float

Volume The amount of space an object takes up

Density –how close together the particles of a substance are, or how much mass a substance has in a given space.